Note If you are running Internet Explorer 10 Release Preview on Windows Server 2008 R2, you must obtain this security update from the Microsoft Download Center. This update will not be distributed for Internet Explorer 10 Release Preview on Windows Server 2008 R2 on Windows Update. For more information, visit the following Microsoft webpage:

Known issues with this security update

Windows Update will not offer this security update to Windows RT-based computers until update KB2808380 has been installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.

How to determine whether you are running a 32-bit or a 64-bit edition of Windows

If you are not sure which version of Windows you are running or whether it is a 32-bit version or 64-bit version, open System Information (Msinfo32.exe), and review the value that is listed for System Type.
To do this, follow these steps:

Click Start, and then click Run, or click Start Search.

Type msinfo32.exe, and then press Enter.

In System Information, review the value for System Type.

For 32-bit editions of Windows, the System Type value is x86-based PC.

For 64-bit editions of Windows, the System Type value is x64-based PC.

For more information about how to determine whether you are running a 32-bit or 64-bit edition of Windows, click the following article number to view the article in the Microsoft Knowledge Base:

827218
(http://support.microsoft.com/kb/827218/
)
How to determine whether a computer is running a 32-bit version or a 64-bit version of the Windows operating system